Synthesis and n.m.r.-spectral analysis of unenriched and [1-13C]-enriched 5-deoxypentoses and 5-O-methylpentoses
作者:Joseph R. Snyder、Anthony S. Serianni
DOI:10.1016/0008-6215(87)80180-5
日期:1987.6
preparing unenriched and [1-13C]-enriched 5-deoxy- and 5-O-methyl-pentoses in the D or L configuration. The 1H-n.m.r. spectra of these compounds have been interpreted, and the 13C-n.m.r. spectra assigned with the aid of 2-D 13C-1H chemical-shift correlation spectroscopy. Tautomeric forms (furanoses, hydrate, and aldehyde) in solution in 2H2O have been quantified with the aid of [1-13C]-enriched derivatives
Asymmetric Self- and Cross-Aldol Reactions of Glycolaldehyde Catalyzed by D-Fructose-6-phosphate Aldolase
作者:Xavier Garrabou、José A. Castillo、Christine Guérard-Hélaine、Teodor Parella、Jesús Joglar、Marielle Lemaire、Pere Clapés
DOI:10.1002/anie.200902065
日期:2009.7.13
facets of enzyme activity: D‐Fructose‐6‐phosphate aldolase (FSA) catalyzes the self‐aldolreaction of glycolaldehyde (GA) and its cross‐aldol addition to other aldehydes. As the affinity of GA for FSA as a donor is higher than that as an acceptor, cross‐aldolreactions are possible with good to poor aldehyde acceptors if the concentration of GA in the reaction is kept low.